Improvement in cutlery-grinding machines



2-Sheets-Sheet1- G. J. CAPEWELL. Cutlery-Grinding Machines. No. 196,333. Patented Oct. 23, 1877.

'WITNESSES okswmw ATT'ORNEY N.PETERS. PHOTO-LITHOGRAPHER, WASHINGTON, p C;

IIII I I FI TT FI 2 Sheets--Sheet 2.

G. J, GAPEWELL.

-Grinding Machines,

Cutlery N0.196,333.

Patented Oct. 23, 1877* A? 1 ILIZNTQR Q WITNESSES UNITED STATES PATENT OFF-ICE.

GEORGE J. OAPEWELL, oE' CHEsEIEE, CONNECTICUT.

IMPROVEMENT IN QUTLERY- GRINDI-NG MACHINES.

Specification forming part of Letters Patent No. 196,333, dated October 23, 1877; applicationfiled July 14, 1877.

To all whom it may concern:

Be it known that I, GEORGE J. GAPEW'ELL, of Cheshire, in the county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Machines for Grinding Cutlery; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying dranu'ngs, and to letters of reference marked thereon, which form a part of this specification.

In the accompanying drawings, Figure 1 represents a rear elevation of my improved grinding-machine. Fig. 2 is a side elevation of the same. Fig. 3 is a perspective view of the same. Fig. 4 is a detail view of the scissors-holder, partly in section. Fig. 5 is a detail view, in perspective, of the knife-holder.

The object of this invention is to provide a grinding apparatus capable of being applied conveniently to a scissors-blade or a knifeblade, or to both at the same time, and provided with suitable adjusting devices for regulating the bevel of the edge or edges ground, and for other purposes. a

The nature of said invention consists, first,

in the combination of a fixed frame, supporting a grinding-wheel, with a movable fi-ame journaled in the same, and supporting a second grinding-wheel, and suitable devices for adjusting said movable wheel toward or from said fixed wheel.

It also consists more particularly in the combination, with said frames and wheels, of an expansion-spring for forcing the same apart and an adjusting thumb-screw, working in a screw-tapped lug of the journaled frame, for drawing them together. It also consists in the combination, with said frames and wheels, of a spring-clamp or knifeholder, consisting of two spring leaves, for holding between them the blade of a knife or other piece of cutlery which is to be sharpened simultaneously on both of its edges.

It also consists in the combination, with said wheels, frames, and spring-clamp or knife-holdv er, of certain adjusting devices, hereinafter described, whereby the position of said clamp is made to conform to the adjustment of said wheels. I

In the accompanying drawings, A designates the bed-piece of my grinding-machine, which is provided with a right-angled downward extension, A the horizontal part of which is screw-tapped to receive .11 upward-working clamping-screw, A ,.whereby the machine is securely though detachably held to a table or other suitable support, and retained in an upright position.

B designates a rigid supporting-frame, consisting of two standards, B B at opposite ends of bed-piece A, and connected at their upper ends by cross-bar B This frame is preferably cast or otherwise formed in one piece with the aforesaid parts A and A O designates a similar, though narrower,

frame, having standards 0 0 top cross-bar G and tubular bottom cross-bar G the latter being sleeved upon a shaft, D, that has its bearings in the lower parts of standards B B. Thus frame 0 is adapted tobe adjusted upon its axis away from or toward fixed frame B, thereby varying the interval between them at will. Stop-blocks c c on the outer sides of standards 0 prevent the upper ends of said frames (which curve away from one another) from being brought too close together by engaging with the standards of the said fixed frame when said movable frame is rocked toward it.

The top of frame B is provided with bearings I) b, in which turns a shaft, E, that carries at one end a grinding-wheel, E, and at the other a small friction-wheel, E The top of frame 0 is provided with similar bearings c c, in which turns a similar shaft, F, that carries at one end a similar grinding-wheel, F and at the other a friction-wheel, F larger than E G designates the driving-wheel of the machine, which is keyed upon or clamped to shaft D, and operated by crank G or by an endless chain or cord passing around circumferential groove 9. Said driving-wheel operates wheel F and shaft F directly; but operates wheel E and shaft E through the medium of friction-wheel E, which turns on a short shaft extending from a lug, 1), formed on the side of the upper end of one of said standards grinding-wheel.

The interposition of this wheel E causes shaftE and its grinding-wheel to turn in a di-i reotion opposite to that of shaft F and its The edge of any blade held between them when in operation will be con spondingly ground on its opposite'sides. s g t s a V knife-holder or clamping device for holdingthe knife or other article of cutlery between said grinding-wheels. It consists of two spring leaves or jaws, it h, which gently clamp the blade between them, and which are:

fastened at their lowerends to the lower part of an angular bracket, I, distinctly shown in The horizontal upper arm of said angular bracket is slotted longitudinally at i. A clamping-screw, I, passes through said slot, andsecures said bracketto the top of frame B. By means of said slot and clamping-screw said knife-holder is adaptedto'conform to the r adjustment of frame 0 when the latter is moved relatively to frame 13. These adjustments of said frame are. affected by means of a screw tapped lug, 0 formed on the side thereof, a socket, 11 on fixed frame B, an adjusting; tlllHnb-SOIBW or screw-threaded rod, J which engages with said socket andworks through said lag, and an 7 expansion spring, 1K, sur

rounding said screw-threaded rod, and bearing at one end against socket b and at the The tightening of said screw rod brings the grinding-wheels together, 7 so as to compensate for wear or adapt the inother against lug o terval to the shape and sizeof: a smaller blade.

NV-hen said screw-rod is turned in the opposite an inelastic inclined metal shank, L, having a laterally-extending head, I, and a plate-spring, L of similar shape, and fastened thereto at its lower end. Said scissors-holder is supported by an inclined bar, B rigidly attached to or formed with frame B, and is adjustable up and down thereon by means of slots 12 I) in said bar, and clamp-screws Mand N, which pass through said slots. Said screws are respectively provided with washer m and washer a, and engage with screw-tapped shank L. By means of these devices the position of the blade to be sharpened may be varied so as to vary the bevel of the sharpened edge, or to compensate for the wear of grindstone E The above-described machine, though referred to especially in connection with knives and scissors, is applicable, also, to sharpening .any'article of cutlery.

In practice I generally prefer to substitute cog-gearing for the friction-gearing E W, E,

andG; but, as these are well-known mechanical equivalents, no further description thereof need be given.

' Belt-gearing mayalso be employed, and the arrangement andnumber of the gear-wheels considerably varied, without departing from the spirit of my'invention. I

I do not wish to confine myself to the preelse construction and arrangement (as shown) of the frames, adjusting devices, and other parts of the machine. Frame Omay be jour .naled by trunnions to frame 13 an exterior retracting-spring may be used instead of expanding-spring K; clamping-collars may be substituted for slots b b, and various other changes may be made. The knife-holder and i i i scissors-holder may beused simultaneously.

' I-Iaving thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

" '1. The combination of a. fixed frame sup- I porting a grindin g-wheel witha movable frame journaled therein 7 and supporting another grinding wheel, and suitable devices for adjusting the latter toward or from said fixed frame and wheel, substantially as set forth.

2. The combination, 'with a fixed grinding wheel frame and a movable grinding-wheel" frame, of an expansion-spring and an adjustin g-screw, arranged and operating substantially as set forth.

'3. The combination, with a fixed grindingwheel and a movable grinding-wheel, of springclamp H, consisting of flexible leaves h h, for holding an article of cutlery between said wheels, substantially as and for the purpose set forth.

4. In combination with a fixed grindingwheel and a movable grinding-wheel of a spring-clamp or knife-holder, a slotted sup-- porting-bracket and a thumb-screw, arranged and operating substantially as set forth.

5. The combination and arrangement of a fixed grinding-wheel frame, a movable grinding-wheel frame, adjustable about the axis of the driving-wheel, independent shafts for said grinding-wheels, friction or cog wheels E E F and a driving-wheel adapted to operate the same, substantially as set forth.

In testimony that I claim the foregoing as my own I affix my signature in presence of two witnesses.

GEORGE J. OAPEWELL.

Witnesses JAMES KnLsEY, GEORGE KEELER. 

